Yarn cutter for bobbin strippers



NOV. 14, 1939. TERRELL 2,179,804

YARN CUTTER FOR BOBBIN STRIPPERS Filed June 9, 1957 Patented Nov. 14,1939 UNITED STATES PATENT OFFICE The Terrell Machine Company,

Charlotte,

N. 0., a corporation of North Carolina Application June 9, 1937, ,SerialNo. 147,221

8 Claims.

The present invention has relation and application to bobbin strippingmachines and other devices in which bobbins having more or less V yarnwound upon them are handled successively or in serial array. It aims toprovide a cutter to clip off the trailing ends of yarn extending fromsuch bobbins which are prone to tangle together and wrap around otherbobbins and A machine parts to interfere with the handling, arrangingand feeding of such bobbins. Additional aims of the invention are toprovide a cutter of this nature of simple and inexpensive constructionand operation, certain in its action, requiring little attention to keepsharp and in working order, and above all offering no risk of injury tothe operator of the machine.

To these ends, the invention comprises a cutter of the type in whicheach of two relatively moving parts is equipped with one or moremutually overlapping laterally extending teeth which shear off the yarnswhich enter between the teeth, after the manner of the familiar hairclipper or harvester mower blade. Relative motion is imparted to theblades by a vibratory drive from any going part on the machine to whichit is applied, and the cutter is located so that the trailing ends ofyarn are drawn or guided between or fall by gravity into the teeth ofthe cutter as the bobbins are fed individually or in small parcels tothe bobbin stripper or other machine in which they are to be operatedupon.

Other aims and features of the invention are as will be made plainhereinafter.

An illustrative embodiment of the invention is shown in the accompanyingdrawing, in which- Fig. 1 is a side elevation of the hopper, bobbinchute, and a portion of the main drive shaft, of a familiar type ofbobbin stripper, showing the cutter of the invention applied thereto.

Fig. 2 is an elevation of the cutter as viewed from the left of Fig. 1,indicating the bobbin chute in dot-and-dash lines to illustrate thelocation of the cutter with respect thereto.

Fig. 3 is an enlarged view of the cutter and its driving means, similarto Fig. 1.

Fig. 4 is a transverse section of the cutter on line d-4 of Fig. 2.

In Fig. 1 is indicated in side elevation so muc of the bobbin stripperof United States Patent No. 1,740,128 as is necessary for anunderstanding of the location and operation of the device of theinvention, the application to such machine being illustrative only andnot restrictive. At

l is indicated a wide, shallow tray or hopper into which the bobbins tobe stripped are dumped in bulk and at random, such hopper having Wallswhich converge at the lower end of the hopper into conformation with theslant and spacing of the inclined Wings 3 of the horizontal portion ofthe bobbin chute of the said machine. At 5 is indicated the arcuateportion of such chute, down which the bobbins descend to the strippingblades 1 by gravity after having been sorted out and arrayed in aprocession within the horizontally extending portion of the bobbinchute. The spaced rails at the convergent bottom edges of the wings 3,and which support the bobbins in pendent relation by engagement with therings on the heads of the bobbins, are indicated at 9 in Fig. 2, as wellas the vertical side-members ll of the horizontal portionof the bobbinchute. A bobbin I3 is shown in pendent relation with its head supportedby the rails 9 and its barrel hanging free from the two side-members.

In the illustrated application, the cutter is located at the junction ofthe narrowed delivery portion or spout of the hopper I with the wings 3of the bobbin chute, with its cutting teeth uppermost and elevated wellabove the level of the interior surface of the bottom of the hopper I,so that the trailing end of every bobbin swept, pulled, or lifted by thehand of the operator into the space between the oblique wings 3 of thebobbin chute will be drawn over the teeth of the cutter to entertherebetween and be clipped off.

The cutter proper is of very simple construction, comprising astationary element l5 of circular section having a radial slot ll formedtherein throughout its entire length and at least one, but preferably aseries, of transverse slots extending across the slot I! at right anglesto the latter, so as to leave a row of teeth 19 at each side of thelongitudinal slot ll. Slidably mounted in slot I! is the movable cutterblade 2|, having at least one, and preferably a series of transverseslots corresponding in spacing with that of the slots separating theteeth I9 of the other part of the cutter. The teeth 23 of the movableblade 2| are materially shorter than those of the stationary element l5,and the spacing of the stationary teeth I9 is close, so that thestationary teeth form a guard at each side of the movable bladepreventing access and injury of the operators hand or fingers.

The two parts thus comprising the cutter are held in cooperatingrelation and in the desired operating position on the machine to whichthey are applied by means of a bracket 25 attached by screws 21 to theoutside of the side wall H of the bobbin chute. At the top of thisbracket is formed a sleeve 29 within which the stationary element iii ofthe cutter fits snugly, being fixed therein by set-screw 3!. To hold themovable blade 2l of the cutter down in the slot H, and also to assist inkeeping the cutter from changing its angular position in the sleeve 29,a keyway 33 is formed in the bore of the sleeve matching the width ofslot II in the stationary element 15, and a key 35 having upturned endsspaced apart by the length of the sleeve 29 is inserted for half itsheight within the keyway 33. The other half of the height of the key 35equals the difference in elevation between teeth 19 and 23, and fillsthe height of slot ll other.- wise left empty by the movable blade 21.The two parts of the cutter are similarly held together in operativerelation at the other end of the cutter, by collar 31, set-screw 3 andkey 4|. This end of the cutter will ordinarily need no individualsupport.

Relative motion is imparted to the two parts of the cutter by means of avibrating lever 43 pivoted on a pin 35 held in lugs M on the bracket 25,such lever having a stud 39 screwed into its upper end and engaging in avertically elongated slot in the outwardly extending end of movableblade Zl. The lower end of lever 43 is slotted longitudinally at M, andstraddles an eccentric portion 39 of a jackshaft 5i rotatably mounted inhub 53 and having fixed thereon a V-pulley 55. A similar pulley 5i fixedon the end of the main drive shaft 59 of the bobbin stripper, within thehousing 65 for the clutch of such machine, is connected by a belt 63with the V-pulley 55, the housing being appropriately slotted.

Rotation of V-pulley 55 in this manner from the continuously-going shaft59 of the bobbinstripper acts in obvious manner through the eccentricportion GQ of jackshaft 5i and. lever 43 to impart a continuousreciprocating movement to the movable blade 2! which exceeds inamplitude the pitch or spacing of the teeth thereof, whereby anytrailing ends of yarn entering between the teeth thereof are speedilysevered. It is to be noted that there are two cutting edges on themovable blade 2! taking part in this severing action one at each face ofthe movable blade. Since the toothed part of the cutter extends acrossthe full width of the bottom of the spout of hopper i, and a substantialdistance above such bottom, all trailing ends which rest on the bottomof the hopper will be drawn over the cutter somewhere in its length andbetween the teeth thereof, to be severed thereby. The side walls of thehopper at the spout, extending above as well as below the cutter, ofcourse serve to guide all trailing ends into a path falling within thetoothed length of the cutter and therefore into the teeth of the cutter.This action is made the more certain because of the fact that thetoothed portion of the cutter is elevated above the straight linebetween a bobbin lying on the bottom of the hopper and the bunch ofwaste on a bobbin hanging from the rails 9 in the bobbin chute asindicated in Fig. 2; thus even if a trailing end of yarn is caught bythe bobbins in the hopper and pulled tight by the operator in insertingthe attached bobbin into the bobbin chute, the end will be brought intoengagement with the cutting teeth of the cutter. The inward surfaces ofthe bobbin-receiving slot in the bobbin chute below thebobbin-supporting top surfaces of the rails 9, also cooperate in guidingthe trailing ends over the cutter and into the teeth thereof.

While I have illustrated and described a certain form in which theinvention may be embodied, I am aware that many modifications may bemade therein by any person skilled in the art, without departing fromthe scope of the invention as expressed in the claims. Therefore, I donot wish to be limited to the particular forms shown, or to the detailsof construction thereof, but

What I do claim is:

1. In a machine for removing waste yarn from bobbins, in combination,stripping means, and a cutter to cut the ends of yarn trailing from thebobbins so as to obviate entanglement and resulting improper working,comprising a plurality of relatively moving members having mutuallyoverlapping teeth provided with cutting edges extending at right anglesto the direction of their relative movement.

2. In a machine for removing waste yarn from bobbins, in combination,stripping means, means for suspending bobbins by their heads and forfeeding them relative to the stripping means, and a cutter comprising atoothed stationary blade in fixed position in the path of the ends ofyarn trailing from the suspended bobbins, and a reciprocating bladehaving teeth extending at right angles to the direction of its movementcoacting with the teeth on the toothed stationary blade to sever thetrailing ends that enter between the teeth of both elements, in order toobviate entanglement and interference with the feeding.

3. In a machine for removing waste yarn from bobbins, in combination,stripping means, and a cutter in the path of movement of the endstrailing from the bobbins to out such ends so as to obviate entanglementand resulting interference with such movement, comprising areciprocating blade having cutting teeth, means at each side of suchblade having teeth coacting with the teeth of the said blade to shearoff trailing ends of yarn entering between the teeth of thereciprocating blade, and means imparting reciprocatory movement to theblade.

4. In a machine for removing waste yarn from bobbins, in combination,stripping means, means guiding the bobbins to such stripping means, anda cutter in the path of travel of the ends trailing from the bobbins tocut such ends so as to obviate entanglement and resulting interferencewith such movement, comprising relatively moving members havingopen-ended transverse slots extending at right angles to the directionof movement of the members with respect to each other, one thereofhaving a slot extending in the direction of such movement to receive andguide the other of such members.

5. In a machine for removing waste yarn from bobbins, in combination,stripping means, and a cutter in the path of movement of the endstrailing from the bobbins to out such ends so as to obviate fouling andconsequent interference with such movement, comprising a longitudinallyslotted member having open-ended slots intersecting the longitudinalslot, a second member slidable lengthwise in the longitudinal slot ofthe first member and also having open-ended slots, and means causingrelative longitudinal reciprocating movement between the two members.

6. In a machine for removing waste yarn from bobbins, in combination,stripping means, and a cutter in the path of movement of'the endstrailing from the bobbins to out such ends so as to obviate fouling andconsequent interference with such movement, comprising a member having alongitudinal slot and open-ended slots intersecting the longitudinalslot at right angles, a second member also having open-ended slots andslidably mounted in the longitudinal slot in shearing relation with theedges of the first members open-ended slots at both sides of the firstmembers longitudinal slot, and means causing relative reciprocatingmovement between the two members.

7. In a machine for removing waste yarn from bobbins, in combination,stripping means, and a cutter in the path of movement of the endstrailing from the bobbins cutting off such ends to obviate entanglementin their subsequent progress through the machine, comprising a blademoving back and forth between stationary abutments spaced apart in thedirection of travel of the blade and on both sides of the blade, theblade working in shearing relation with the abutments at two sides ofthe blade.

8. In a machine for removing waste yarn from bobbins, in combination,stripping means, means for suspending bobbins by their heads, and acutter in the path of the ends of yarn trailing from the suspendedbobbins, comprising a plurality of relatively moving members havingmutually overlapping teeth extending at substantially right angles tothe direction of their relative movement cutting ofi such ends toobviate intertangling.

EDGAR ALLEN 'IERRELL.

